Search results

Sort By:

Limit search:

Superconductivity in U-T Alloys (T = Mo, Pt, Nb, Zr) Stabilized in the Cubic γ-U Structure

100%

Sowa S., Kim-Ngan N., Krupska M., Paukov M., Tkach I., Havela L.

Acta Physica Polonica A

2016

vol. 130

issue 2

521-526

Using ultrafast cooling (with the cooling rate up to 10⁶ K/s) helps to minimize the T-alloying concentration (T = Mo, Pt, Pd, Nb, Zr) necessary to retain the γ-U phase down to low temperatures. All investigated splat-cooled U-T alloys become superconducting with T_{c} in the range of 0.61-2.11 K. The bulk character of superconductivity can be concluded for some of the splats when comparing the specific-heat anomaly at T_{c} with the BCS theory prediction.

Characterization of New U-Ni-X₂ Splats and Study of their Physical Properties

84%

Molčanová Z., Mihalik M., Mihalik M., Reiffers M., Džubinská A., Huráková M., Kavečanský V., Paukov M., Havela L.

Acta Physica Polonica A

2017

vol. 131

issue 4

994-996

We explored the crystal structure, magnetic, and transport properties of UNiX₂ (X = Ge, Si) materials, which were prepared by a conventional metallurgical technique and by rapid solidification - splat cooling. The UNiSi₂ splat is mostly single phase, containing only small traces of a minority phase. Magnetic and electrical properties of the splat resemble properties of samples, which were prepared by conventional methods, exhibiting a ferromagnetic transition at about 91 K and similar temperature dependence of resistivity. The coercive field of μ₀H_c=4.25 T is much enhanced due to the magnetic anisotropy introduced by the sample preparation technique. The Barkhausen jumps were observed on the hysteresis loop. Magnetization of the sample does not saturate in fields up to μ₀H=9 T. The phase structure of UNiGe₂ splat is not completely solved and will be subject of our study in future. Our preliminary results indicate the presence of completely new phase with tetragonal crystal structure and antiferromagnetic ordering below 54 K.

Refine search results

2 Acta Physica Polonica A

1 2017

1 2016

2 Havela L.

2 Paukov M.

1 Džubinská A.

1 Huráková M.

1 Kavečanský V.

1 Kim-Ngan N.

1 Krupska M.

1 Mihalik M.

1 Molčanová Z.

1 Reiffers M.

1 Sowa S.

1 Tkach I.

Search results

Superconductivity in U-T Alloys (T = Mo, Pt, Nb, Zr) Stabilized in the Cubic γ-U Structure

Characterization of New U-Ni-X₂ Splats and Study of their Physical Properties